Call of Catthulhu the rules light RPG where cats save the world and the humans just open the tuna.

In Lovecraftian German, the name of this book, more or less, means "Unspeakable Cats." To aspiring Cat Herders, it definitely means a wealth of vital information about running a rousing game of Call of Catthulhu, the game where ordinary cats secretly defend human civilization from the Chaos cults of the other animals. With this and Book 1: The Nekonomikon, you're ready to play.